Hello,

On Fedora 27, if you install 'dracut-fips' package, MariaDB server won't start with folowing explanation:

mysql-prepare-db-dir[17281]: 2017-12-04  8:24:26 140228227141056 [ERROR] Incompatible OpenSSL version. Cannot continue...

it calls CRYPTO_set_mem_functions() from libcrypto.so, which returns 0 here:

┌──crypto/mem.c──────────────────────

│39          if (!allow_customize)

│40              return 0;         

And that's the issue.
Package 'dracut-fips' will cause, that in libcrypto constructor FIPS self-tests must be called. FIPS self-test calls allocations and that's why the allocation function cannot be altered.

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The same state should be achieved in FIPS mode, although so far I talked about installed 'dracut-fips' package, but still disabled FIPS mode.